Grinding-machine.



F. E. BRIGHT.` GRINDINGMACHINE. APPLICATION FILED MAY 6. 1915. r 1, 1 989 6 L Patented Sept. 19, 1916.

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F. E. BRIGHT.

GRNDING MACHINE; APPLICATmN-HLED MAY631915.

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F. E. BRIGHT.

GRINDING MACHINE.

APPLICATION FILED' MAY s. I9I'5.

Patented Sept. 19, 1916.

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Inventor:

FRED E. BRIGHT, lIHIL.ALDELIEI-IIA., PENNSYLVANIA.

GRINDING-MACHINE.

Specification of Letters Patent.

Application led May 6, 1915. Serial No. 26,275.

To all whom t may concern Be it known that I, FRED E. BRIGHT, a

citizen of the United States, residing atl Philadelphia, in thecounty of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Grinding-Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to grinding or finishing machines, and' has reference more particularly to that type of machine inwhich the work is rotated while being subjected to the action of an operating tool.

The' invention is designed with special reference to the handling of annular forms or shapes, suoli forinstance as the casingmembers or bearing-rings of antifriction bearings, the particular form of mechanism here shown as embodying my invention, being adaptable for operating on the bores of the inner easing-members of the bearings, in-order to give the bore its proper and accurate -finished condition.

In its general organization, the mecha- 'nism embodying my invention comprises a holder for the work, in this instance the inner casing-member of an antifriction bearing, which holder is adapted to be rotated so as to correspondingly rotate the work about its longitudinal axis, and which holder is adapted also to be moved in a direction axially of the work in order to present all portions of the bore to the action of the operating tool; a rotary tool-carrying member arranged within the Work holder; and means for moving the tool-carrying member radially of the work holder to cause the tool to be fed to and enter more deeply into the material of the work.

In the more specific embodiment of the invention, the work holder is in the form of a rotatable sleeve movable axially of its axis of rotation, and the operating tool is inthe form of a grinding wheel carried by .a spindle extending longitudinally within the rotary sleeve andmounted for rotation eccentrically Within an adjusting sleeve, which latter is mounted for rotary oscillation within the rotary work holding sleeve, whereby the tool spindle may be adjusted radially of the rotary work-holding sleeve. These parts are arranged in an upright position, and the work-holding sleeve is provided withan internal annular chami ber surrounding the tool spindle and in position to receive the grindings, water, and fine particles produced by the operation of the grinding wheel on the work. As a result of this constructionand arrangement,

the rotary parts are edectively balanced, and so sustained as to avoid undue wear and consequent misalinement; the work operated on is supported and exposed in the most convenient position for attachment, removal and examination; and the grindings, due to the operation of the grinding wheel on the work will leave the lsame promptly, and be 'collected and discharged from the machine, without danger of their finding access to or interfering with the relatively movable parts.

The mechanism shown in the accompanying drawings illustrates one form of my invention by way of example and which in practice has been found to answer to a satisfactory degree the ends to be attained. It will be manifest, however, that the construction may be modified and changed by the skilled mechanic without departing from the limits of the invention; and further it will be understood that the invention is not limited to any particular form of construction of the parts except in so far as such limitations are specified in the claims.

In, the accompanying drawings: Figure 1 is a side elevation partly in section of my improved machine, the work operated on being shown in dotted lines. Fig. 2 is a horizontal sectional plan view on the line fit-a of Fig. 1. Fig. 3 is an end elevation of the machine as viewed the direction of the arrow in Fig. 1. Fig. 4 is a view on an enlarged scale looking downward on the workcarryingsleeve, grinding wheel and adjacent parts. Fig. 5 is a horizontal `sectional plan view on the line b-b of Fig'. 1. Fig. 6 is a horizontal sectional view on the line o-o of Fig. 1. r

Referring to the drawings: The operative parts of the machine are mounted on and sustained by a suitable frame 1 comprising a horizontal bed plate 2 supported by legs 3, from one side of which plate extends a standard 3. At one end the bed plate is formed with a vertical circular opening 4 in which is firmly clamped the lower end of a vertical supporting sleeve 5 which extends upwardly some distance above the base Patented sept. 1a, 191e.

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plate. The supporting sleeve is formed with' a longitudinally extending circular opening disposed eccentrically ot the axis of the sleeve, and in this opening is mounted for rotary oscillation, an adjusting sleeve 6, the upper end of which is provided with an annular shoulder 6a which rests on the upper end of the supporting sleeve, whereby the adjusting sleeve is sustained by the supporting sleeve. rlhe adjusting sleeve is provided with a. circular longitudinal opening which is disposed in eccentric relation to the axis of the sleeve, and in this opening is mounted for rotation, a tool-carrying spindle l' extending at its upper end beyond the end of the adjusting sleeve 6, Where the spindle has lixed to it an operating tool in the form or' a grinding Wheel 8. Near its upper end the spindle has fixed to it a cylindrical bearing collar 9 which is mounted tor rotation in a bearing opening in the upper end of 'the adjusting sleeve, While near its l Wer end the spindle receives its rotary support from a ball bearing 10 supported at the lower end oi' the adjusting sleeve, it being understood that the axes of the tivo end bearings :tor the spindle are coincident, but disposed centrically With relation to the central axis of the adjusting sleeve. is a result of this construction and relation of the parte, when the adjustin g sleeve oscillated Within the sleeve the tool spindle vvill en or adjusted radially, the purpose ot this adj ustnient being to cause the grinding Wheel to 'feed up to the vvorlt and enter more deeply into the material thereof. Surrounding the upper portion of the sleeves 5 and G and the inclosed tool spindle, is a Work-carrying sleeve 11 which is adapted to be rotated so as to impart a corresponding rotation to the Work, and which is adapted also to be moved axially so as to impart a corresponding feeding movement to the Work in order to present all portions of the same to the action of the grinding Wheel. The sleeve 11 is provided with an internal cylindrical neck 12 extending respectively above and belov.7 the loiver end of the sleeve and connected thereto by means ol a radially extending portion 13, which neck lits around the supporting sleeve 5 and has a bearing thereon in such manner that it may be moved axially thereof relatively to said bearing and also may be rotated thereon. The upper portion of the neck is spaced from the inner surface ot the sleeve so as to form an annular chamber 11i which is open at its upper end, and which is closed at its lower end by means of the radially extending trough 1G, the purpose of this chamber being to receive the grlnrlings produced in the action of the Wheel S on the Work. The Work, in the present instance the inner casing X of an antiiiricticn bearing, is supported by means of a chuck Y or other suitalessia.

able Work holder applied to the upper end of the sleeve 11, and the latter being rotated and moved axially in the manner to be presently described, all portions of the bore of the Work Will be presented to the action of the grinding tool, Which latter being rotated and shifted radially, will subject the bore to a grinding operation and give to the same its proper and accurate .finished condition. In such operation it is usual to employ Water to prevent the generation of excessive heat, and as the grinding operation proceeds, the Water and grindings will iovv downwardly by gravity and enter the chamber 14, from Which they vvill be discharged through outwardly and downwardly extending pipes 15 leading outwardly through the side' of the sleeve 11 from the bottom et the chamber, the discharge of the grindings being effected by the centrifugal force due to the rotation of the sleeve. The grindings are received in an annular trough 16 surrounding the lower end et the sleeve and supported in the manner to be more fully described hereinafter, from which trough they are discharged through an opening 1ba in the bottom of the same.

The grindings are prevented from reaching the bearings and relatively movable parts of the mechanism, by means of two annular shields 17 and 18, which surround and inclose the upper portions of the spindle and the supporting and adjusting sleeves. The shield 1T-is fixed to the upper end of the supporting sleeve 5, and is provided with a. downwardly extending neck 17 projecting into the upper end of the chamber le, and surrounding the upper portion of the neck 12. This shield is provided also with an upwardly extending neck 17b projecting inwardly across the upper end of the adjusting sleeve 6 and being provided with an opening 1TC surrounding the tool carrying spindle, the opening being of such diameter as-to admit of the radial adjusting movements of said spindle. The shield 18 is firmly lixed to the tool carrying spindle above the neck 17'b of the other shield, and is extended outwardly so as to cover the opening 17c in said shield. The action of the shield 18 is to direct the grindings onto the shield 17, and the action ot' the latter is to direct the grindings downwardly 'into the chamber 14, these two shields thus coperating in preventing the grindings from finding access to the relatively moving parte of the machine.

Rotary motion is imparti-fl to the Workcarrying sleeve 11 by means ol a horizontal driving pulley 2O receiving vertical and radial support by means of an anti'liriction bearing `21, respectively from the bed plate 2 and the supporting sleeve 5, this pulley being driven by a belt 21 receiving motion Jfrom any suitable source of power, The

niagara n the downwardly extending portion of the neck 1.2, which latter is provided with keys E 23, sliding loosely in vertical key ways 24 zlormed in the interior of the extension 22.

As a result of this'arrangement, the work carrying sleeve 1l may be moved up and down. relatively to the drivingpulley 20, and in suchmovement the rotary motion of the pulley will be transmitted to the sleeve, whereby the latter is given an axial motion, and a rotary motion about its axis of movement.

The sleeve is given its axial movement by means of a vertically reciprocating member in the form of a horizontal lever 24 pivoted near one end by means of a horizontal pivot bolt 25, to the standard 3, and having its opposite end forked so as to extend on opposite sides of the cylindrical extension 22 of the pulley. The forks of this lever are provided with supporting rollers 26 which bear beneath and 'give support to an inwardly extending flange 16b on the annular trough 16 before alluded to. This trough in turn gives support to the work carrying sleeve 11, through the medium of a thrust ybearing 27, the result of this construction being that while the trough and supported sleeve ll will be moved up and down by the pivotal lever 24, the rotationof the sleeve will not be imparted to the trough. The lever 24 is' moved up and down on its axis by means of a cam 28 mounted on one end of a horizontai transverse shaft 29 mounted in suitable bearings in the standard 3', the said cam engaging a roller 30 journaled on the lever. The shaft 29 has fixed to it a worm wheel B1 driven by a vertical worm 32 mounted on a shaft 33 journaled in vertical bearings in the standard, the lower end of the shaft being extended below the bed plate and being provided With driving pulleys 34 which latter are driven by a belt 35 receiving motion from any suitable source of power.

The radial movement of the wheel spindle,

to effect a corresponding movement of the grinding wheel to cause the latter to feed up toV and enter more deeply into the material of the work, is e'ected by means of a horizontal segment gear 36 fixed to the lower end of the adjusting sleeve 6 and engaged by a horizontal worm 87 mounted in bearings in the base of the frame, said worm being extended at the front of the frame where it is provided with a hand crank 38 for turning it. The worm has fixed to it adjacent the hand crank, a graduated wheel 39 adapted to be read in connection with a pointer 40 fixed to the frame, whereby the grinding wheel may be adyusted and to predetermined distances.

The tool spindle receives itsrotary mcy gradually tion from a driving pulley 41 fixed to its lower end and driven by a belt 42 receiving motion from a suitable source of power.

In the operation of the device the work being firmly 4held by the work holder on the upper end of the sleeve 11, the latter is rotated and moved back and forth axially by the mechanism described. The grinding wheel being rotated, and being fed radially by means of the hand crank 38, the wheel will be caused to act on the interior of the bore of the work, and all portions of the latter will be presented by the rotary and axial movements of the work carrying sleeve, to the wheel, resulting in the grinding and final accurate shaping of the bore. Due to the upright position of the parts, the grindings will quickly leave the wheel and work, and pass by gravity into the chamber 14 from which they will be discharged by centrifugal force through the pipes 15, and will be received in the trough 16 and will leave y f L Having thus describedimy invention, what I vclaim is:

1. In a machine of the type described, the combination of a rotary work sleeve adapted to carry a work holder, a rotary tool spindle extending permanently within the sleeve and adapted to carry an operating tool, and means for effecting a 4feeding movement of the work sleeve axially relatively to the tool spindle.

2. In a machine of the type described, the Combination of a rotary work-carrying sleeve, a rotary tool spindle extending within the said sleeve, means for effecting a feeding movement of the sleeve axially of the spindle, and means for effecting a feeding movement of the spindle radially of the sleeve.

In a machine of the type described, the combination of a work-carrying member and a tool carrying member extending one longitudinally within the other, and means for actuating the same to operate on the work. said members being formed and disposed relatively to leave an annular space between them to receive the grindings.

4. In a machine ofthe type described, the combination of a rotary work-carrying member, and a rotary tool-carrying member, said members being arranged in an upright position one within the other, and means for actuating the same to operate on the worin,

tween them into which the grindings may pass by gravity.v

5. In a machine of the type described, the combination of a rotary work-carrying sleeve, a rotary tool-carrying spindle extending longitudinally within the sleeve, said parts being formed and disposed relatively 'to leave an annular space between them in position to receive the grindings, and means for actuating said sleeve and spindle to operate on the work.

6. In a machine of the type described, the combination of a work-carrying member and a tool-carrying member extendingone longitudinally within the other, means for actuating the same to operate on the work, said members being formed and disposed relatively to leave an annular space between them to receive the grindings, and a shield in position to direct the grindings into said space.

7. In a machine of the type described, the combination of a rotary worlrcarrying sleeve, a rotary tool-carrying spindle extending longitudinally within the same, said parts being arranged in an upright position and being formed and disposed relatively to leave an annular space between them to receive the grindings, and a shield carried by the tool carrying spindle and serving to direct the grindings into said space.

8. In a machine of the type described, the combination of a rotary work-carrying sleeve, a supporting sleeve extending longitudinally within the same, a rotary tool spindle extending longitudinally within the supporting sleeve, said sleeves being relatively ormed and disposed to leave an annular space to receive the grindings, a shield carried by the supporting sleeve in position to direct the grindings into said space, and

- a shield carried `by the tool spindle in position to direct the grindings onto the other sleeve.

9. In a machine of the type described, the

vcombination of a rotary work-carrying sleeve, a supporting sleeve extending within the same with an annular space surrounding the supporting sleeve, and an annuar shield carried by the supporting sleeve and extending into said space to direct the grindings into the same.

10. In a machine of the type described, the combination ot' a rotary work-carrying sleeve, a supporting sleeve extending within the same, a rotary tool spindle within the supporting sleeve, means for moving the tool spindle radially within the supporting sleeve, said work-carrying sleeve vbeing formed and disposed relatively to leave a space surrounding the supporting sleeve to receive the grindings. a shield carried by the supporting sleeve and having an opening therethrough to permit the radial movement of the tool spindle, and a shield carried by the tool spindle and extending over the opening in the irst mentioned sleeve.

1l. In a machine of the type described, the combination of a work-carrying sleeve, a tool-carrying spindle extending Within the sleeve, said sleeve being provided with an annular internal chamber surrounding the tool spindle and in position to receive the grindings, and means for actuating said parts to operate on the work.

1Q. In a machine of the type described, the combination of a work-carrying sleeve, a tool spindle extending within the sleeve, said sleeve being provided with an annular internal chamber surrounding the tool spindle and in position to receive the grindings, and said'chamber being provided with an opening for the discharge of the grindings, an annular trough in position to receive the grindings discharged from the chamber, and means for actuating the sleeveand spindle to operate on the work.

13. In a machine of the type described, the combination'of a work-carrying sleeve provided `with a neck extending within the same and spaced therefrom to form an annular chamber to receive the grindings, a rotary tool spindle extending Within said neck, and means for actuating the said parts to operate on the work.

14. In a machine of the type described, the combination of a Work-carrying sleeve, a tool spindle extending within the same, said sleeve being provided with an annular internal chamber surrounding the tool spindle and in position to receive the grindings, and said. chamber being provided with discharge openings extending outwardly through the sleeve; whereby the contents of the chamber will be discharged by centrifugal force, and means for actuating the sleeve and spindle to operate on the work.

15. In a machine of the type described, the combination of a work-carrying sleeve, a tool spindle extending within the same, said parts being arranged in an upright position and said sleeve being movable vertically, a vertically reciprocating member supporting said sleeve, and means for reciprocating said member.

16. In a machine of the type described, the combination of a vertical rotary workcarrying sleeve movable axially, a rotary tool spindle therein, a. horizontal driving pulley to which the sleeve is splined, means for rotating the pulley, a vertically reciprocating member supporting the sleeve, and means for reciprocating said member.

17. In a machine of the tvpe described, the combination of an axially movable work-carrying member adapted to support the work in position to be operated on, a rotary driving member with which said work-carrying member has a sliding driving engagement, means for rotating the inseriadriving member, and means for moving the Work-carrying member axially; whereby the latter will receive rotary motion from the driving member.'

18. In a machine of the type described, the combination of a rotary sleeve adapted to carry a Worlrholding device, a rotary tool-carrying spindle extending Within the sleeve, and means for edecting a feeding movement of the tool-spindle transversely of the aXis of the sleeve.

19. ln a machine of thetype described, the combination of a rotary sleeve adapted to carry'a Work-holder, a rotary tool-spindle extending Within the sleeve and adapted to carry an operating tool, one of said 'parts being movable axially relatively to the other to cause the tool to traverse the Work axially, and one lof said parts being adjustable transversely relatively to the other to cause the tool to enter into thematerial of the Work.

20. ln a machine of the type described, the combination of a frame, a rotary sleeve mounted therein and adapted to carry a Work-holding device, an oscillating adjusting sleeve Within the rotary sleeve, and a rotary l tool-spindle mounted eccentrically Within Within the rotary sleeve, an adjusting sleeve mounted eccentrically Within the supporting sleeve for oscillation therein, and a roj l tary tool-carrying spindle mounted eccentrically Within the adjusting sleeve.

22. in a grinding machine, and in combination with a trame sustaining a bearing surface, a Work-carrying member rotatable on said bearing surface, a rotary tool-spindle adapted to carry an operating tool, means for reciprocating the Work-carrying member in the direction of its axis of rotation and relatively to said bearing surface to cause the Work to traverse the tool, and means for eiecting a feeding motion of the Work-carrying member and tool-spindle one relatively to the other transversely of said axis to cause the tool to enter the material of the ivorlr, l

23. ln a grinding machine and in combination with a frame sustaining a cylindrical bearing surface, a Work-carrying sleeve surrounding said bearing surface'and rotatable thereon, a rotary tool-spindle, means for reciprocating the'Worll-carrying sleeve on its cylindrical bearing surface in the direction of the axis of rotation of the sleeve, and in relation to said bearing surface to cause the Work to traverse the tool, and means for imparting a feeding movement to the tool-spindle transversely of said axiso rotation to cause the tool to enter the material of the Work.

In testimony whereof, I have axed my signature in presence of two Witnesses,

FRED TE. BRiGI-T, 

